Azoospermia can be caused by many factor. If you have Testicular failure then the treatment would be depending on the reason for the testicular failure.
One good site for urology information is from Dr. Paul Turek in San Franciscio.
This is from his website: http://www.theturekclinic.com/html/services_azoospermia.html#whatIs
TABLE 1. CONDITIONS THAT CAUSE AZOOSPERMIA
Primary testicular failure
Klinefelter syndrome
Y chromosome microdeletions
Genetic infertility due to abnormal chromosomes (karyotype)
Unexplained genetic infertility
Secondary testicular failure
Kallman Syndrome
Unexplained gonadotropin deficiency
Hypothalamic/pituitary tumor
Hyperprolactinemia
Cancer treatment (chemotherapy, radiation, surgery)
Varicocele effec
Pituitary suppression
Drug induced (anabolic steroids, alcohol, glucocorticoids)
Testosterone supplements
Congenital adrenal hyperplasia
Severe illness (cancer, kidney or liver failure)
Diabetes mellitus
Sickle cell anemia
Hemachromatosis
Sperm autoimmunity
Pesticide/toxin exposure (including hot tubs and baths)
Undescended testicles at birth
Obstruction
Congenital absence of the vas deferens (CAVD)
Ejaculatory duct obstruction
Epididymitis
Scrotral trauma or surgery
Young syndrome
Vasectomy
So as you can see the list is long for just testicular failure and so I could not suggest any treatment unless we have the diagnosis.